body, a, img, h2 {
  margin: 0;
  padding: 0;
}

#zz {
  background-color: aqua;
  position: relative;
  width: 500px;
  height: 500px;
  background: #fff;
  overflow: hidden;
}

.k {
  position: relative;
  overflow: hidden;
  top: 70px;
  left: 50%;
  width: 350px;
  transform: translate(-50%, 0);
}

#dl {
  position: relative;
  width: 80px;
  height: 35px;
  text-align: center;
  line-height: 35px;
  float: left;
}

#zc {
  position: relative;
  width: 80px;
  height: 35px;
  text-align: center;
  line-height: 35px;
  float: right;
}

form {
  position: relative;
}

.sr {
  width: 350px;
  height: 300px;
  overflow: hidden;
}

.sr > div {
  width: 250px;
  margin-left: 30px;
  margin-top: 25px;
}

.sr > div > input {
  float: right;
}

.sr span {
  height: 21px;
}

.sr > div > div {
  height: 21px;
  color: red;
}

.tj {
  width: 90px;
  height: 30px;
  margin: 35px 0 0 30px;
}

#bbg {
  margin-left: 30px;
  margin-top: 0;
}
.fanhui{
  float: right;
  width: 100px;
  height: 100px;
  border: 1px solid black;
  font-size: 100px;
  text-align: center;
}
